In situ online detection of atmospheric particulate matter based on laser induced breakdown spectroscopy: a review

Abstract

The main objective of this review is to provide a brief overview of some new directions and trends in the field of atmospheric particulate matter detection by laser-induced breakdown spectroscopy (LIBS) in recent years. Particulate matter, which is tiny solid or liquid particles suspended in the air, is a major form of air pollution and has important implications for both air quality and human health. Realizing real-time online detection of particulate matter is of great significance. LIBS is an atomic emission spectroscopy technique that uses a laser to excite a sample to produce plasma, and the composition and content of elements are determined by analyzing the resulting spectrum. The rapid detection and multi-element analysis of LIBS show its unique advantages in the detection of atmospheric particulate matter. To illustrate the new progress of LIBS technology in the field of atmospheric particulate matter detection, several typical cases are listed in this review, including liquid aerosol monitoring, isotope detection, indoor particulate matter detection, and industrial scene particulate matter detection.